Patents by Inventor Michael S. Hawkins

Michael S. Hawkins has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Toner compositions and processes
    Patent number: 9012118
    Abstract: Toners are provided which possess excellent blocking characteristics. The toners include cores including amorphous resins having low glass transition temperatures, amorphous resins having high glass transition temperatures, and crystalline resins, and shells including amorphous resins having high glass transition temperatures.
    Type: Grant
    Filed: March 4, 2010
    Date of Patent: April 21, 2015
    Assignee: Xerox Corporation
    Inventors: Allan K. Chen, Tie Hwee Ng, Edward Graham Zwartz, Michael S. Hawkins
  • Simplified Process for Sustainable Toner Resin
    Publication number: 20150056550
    Abstract: The disclosure describes a one reaction process for making a bio-based polyester resin. The resultant polyester resin retains thermal properties as compared to a similar resin but made using previous multi-step processes conducted in separate vessels.
    Type: Application
    Filed: August 22, 2013
    Publication date: February 26, 2015
    Applicant: Xerox Corporation
    Inventors: Guerino G. Sacripante, Ke Zhou, Edward G. Zwartz, Michael S. Hawkins, Veronique Laberge, Alan EJ Toth, Rashid Mahmood, Mark R. Elliott, John Abate
  • Toner Compositions
    Publication number: 20150010336
    Abstract: The present disclosure provides for enzymatic polymerization to produce polyester resins suitable for use in manufacturing toners. In embodiments, crystalline copolymers, which are polyesters, may be synthesized from lactones, cyclic anhydrides, cyclic carbonates, and combinations thereof. These crystalline copolymers, in turn, may be utilized in the synthesis of toner particles.
    Type: Application
    Filed: September 20, 2014
    Publication date: January 8, 2015
    Inventors: Jordan H Wosnick, Santiago Faucher, Edward G Zwartz, Michael S Hawkins, Karen A Moffat
  • Carrier Resins With Improved RH Sensitivity
    Publication number: 20140370435
    Abstract: The instant disclosure describes methacrylate coated carrier resins with aromatic substituent groups with optionally carbon atoms replaced by heteroatoms such as S, N, and O for charge control and improved RH sensitivity.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: Richard PN Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Daryl W. Vanbesien, Michael S. Hawkins
  • Carrier Resins With Improved RH Sensitivity
    Publication number: 20140370432
    Abstract: The instant disclosure describes acrylate-coated carrier resins exhibiting both high charge and improved RH sensitivity, carrier compositions comprising the acrylate coated carriers and developers comprising the carrier resins.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: Richard PN Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Daryl W. Vanbesien, Michael S. Hawkins
  • Negative Charge Carrier Resins With RH Sensitivity
    Publication number: 20140370429
    Abstract: The instant disclosure describes methacrylate coated carrier resins with hydrophobic substituents for charge control and improved RH sensitivity.
    Type: Application
    Filed: June 14, 2013
    Publication date: December 18, 2014
    Inventors: Richard PN Veregin, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Daryl W. Vanbesien, Michael S. Hawkins
  • CARRIER RESINS WITH IMPROVED RELATIVE HUMIDITY SENSITIVITY
    Publication number: 20140302435
    Abstract: The disclosure generally describes carrier resins, and in particular, resins used for carrier coatings which include at least one ester functional group and at least one cyclic aliphatic group containing at least one nitrogen atom in the cyclic ring structure. Carriers having such resins in the coating exhibit high charge and excellent relative humidity (RH) sensitivity of charge to changing environmental conditions.
    Type: Application
    Filed: April 3, 2013
    Publication date: October 9, 2014
    Applicants: National Research Council of Canada ("NRC"), XEROX CORPORATION
    Inventors: RICHARD P. VEREGIN, Qingbin Li, Andriy Kovalenko, Sergey Gusarov, Darren Makeiff, Valerie Farrugia, Michael S. Hawkins
  • IMAGE FORMING SYSTEM
    Publication number: 20140295333
    Abstract: The presently disclosed embodiments relate generally to image forming systems comprising imaging apparatus members and toner compositions. More specifically, the present embodiments relate to specific toner compositions for use with electrophotographic imaging members comprising an overcoat layer protecting the imaging member surface and a contact type charging device, such as a “bias charge roll” (BCR). The toner compositions comprise a combination of additives that provide an image forming system that does not suffer from the commonly observed deletion and imaging member wear issues.
    Type: Application
    Filed: March 29, 2013
    Publication date: October 2, 2014
    Applicant: XEROX CORPORATION
    Inventors: Richard A. Klenkler, Yu Liu, Sarah J. Vella, Michael S. Hawkins, Richard P. Veregin, Vladislav Skorokhod, Thomas R. Pickering
  • Cardanol derivatives in polyester toner resins
    Patent number: 8771913
    Abstract: The present disclosure provides a polyester toner resin comprising a polyhydroxylated cardanol derivative, that may be used in manufacturing an emulsion aggregation (EA) toner for imaging devices.
    Type: Grant
    Filed: December 18, 2012
    Date of Patent: July 8, 2014
    Assignee: Xerox Corporation
    Inventors: Jordan H Wosnick, Guerino G Sacripante, Ke Zhou, Edward G Zwartz, Michael S Hawkins
  • Cardanol Derivatives in Polyester Toner Resins
    Publication number: 20140170555
    Abstract: The present disclosure provides a polyester toner resin comprising a polyhydroxylated cardanol derivative, that may be used in manufacturing an emulsion aggregation (EA) toner for imaging devices.
    Type: Application
    Filed: December 18, 2012
    Publication date: June 19, 2014
    Applicant: XEROX CORPORATION
    Inventors: Jordan H. Wosnick, Guerino G. Sacripante, Ke Zhou, Edward G. Zwartz, Michael S. Hawkins
  • LATEX CARRIER COATING AND METHODS FOR MAKING THE SAME
    Publication number: 20140154622
    Abstract: A carrier coating comprising a metal core and a polymeric coating that may be used to form toner. The carrier coating, through how it is made, exhibits improved coating abilities that may be used to completely coat carrier particles, and thus provide excellent aging performance.
    Type: Application
    Filed: December 3, 2012
    Publication date: June 5, 2014
    Applicant: XEROX CORPORATION
    Inventors: VALERIE FARRUGIA, Paul J. Gerroir, Michael S. Hawkins, Richard P. Veregin, Karen Moffat
  • Curable toner compositions and processes
    Patent number: 8722299
    Abstract: Processes for producing emulsion aggregation toners are provided. In embodiments, methods of the present disclosure may be utilized to produce toners suitable for low melt applications, including use in flexible packaging applications, where low pile height is desired for low cost and flexibility. In embodiments, the EA toners may include small particles having a shell with a high amount of resin, which optimizes the charging characteristics of the toner.
    Type: Grant
    Filed: September 15, 2009
    Date of Patent: May 13, 2014
    Assignee: Xerox Corporation
    Inventors: Guerino G. Sacripante, Maria Jimena Loureiro, Cuong Vong, Richard P. N. Veregin, Michael S. Hawkins, Edward Graham Zwartz
  • Toner compositions and processes
    Patent number: 8663886
    Abstract: The present disclosure provides polymeric additives for use with toner particles. The polymeric additive of the present disclosure includes a copolymer possessing at least one monomer having a high carbon to oxygen ratio, a monomer having more than one vinyl group, and at least one amine-functional monomer. Toners possessing this polymeric additive exhibit excellent stability with respect to relative humidity and excellent charging characteristics.
    Type: Grant
    Filed: December 21, 2010
    Date of Patent: March 4, 2014
    Assignee: Xerox Corporation
    Inventors: Daryl W. Vanbesien, Richard P. N. Veregin, Suxia Yang, Corey L. Tracy, Karen Ann Moffat, Cuong Vong, Eric Rotberg, Michael S. Hawkins
  • Mixer apparatus and method of making developer
    Patent number: 8642241
    Abstract: The present teachings describe an apparatus for mixing developer. The apparatus includes a first loader for dispensing a predetermined amount of toner particles into a container and a second loader for dispensing a predetermined amount and carrier particles in the container. A sealer seals the container. An acoustic mixer is provided for mixing the container, toner particles and carrier particles at a resonant frequency. A method of mixing developer is disclosed.
    Type: Grant
    Filed: December 21, 2011
    Date of Patent: February 4, 2014
    Assignee: Xerox Corporation
    Inventors: Majid Kamel, Suxia Yang, Richard P. N. Veregin, Michael S. Hawkins, Cuong Vong, Santiago Faucher
  • Toner compositions and processes
    Patent number: 8603720
    Abstract: A process for preparing a toner includes forming an emulsion with a buffer solution and an amorphous biodegradable polyester resin represented by Formula (1): wherein each n independently represents an integer of 1 to about 20 and x and y represent respective ratios of respective monomeric units and x ranges from about 0 to about 1000 and y ranges from about 0 to about 300; adding a colorant, a coagulant, and optionally a wax to the emulsion to form a mixture; heating the mixture, permitting aggregation and coalescence of the mixture to form toner particles; and recovering the toner particles.
    Type: Grant
    Filed: February 24, 2010
    Date of Patent: December 10, 2013
    Assignee: Xerox Corporation
    Inventors: Ke Zhou, Guerino G. Sacripante, Edward G. Zwartz, Michael S. Hawkins
  • Super low melt toner with core-shell toner particles
    Patent number: 8592119
    Abstract: A toner particle having a core and a shell, and a method for making the toner particle. The core includes a crystalline resin and the shell includes an amorphous resin. The shell is substantially to completely free of the crystalline resin. The toner particle permits inclusion of greater amounts of crystalline resin materials in the core, thereby lowering the minimum fusing temperature of the toner formed from the particles.
    Type: Grant
    Filed: March 6, 2012
    Date of Patent: November 26, 2013
    Assignee: Xerox Corporation
    Inventors: Jordan H. Wosnick, Richard P. N. Veregin, Edward G. Zwartz, Michael S. Hawkins
  • CUSTOM COLOR TONER PRODUCTION SYSTEMS AND METHODS
    Publication number: 20130255190
    Abstract: A custom color toner production system includes a toner delivery system, a cartridge sealing system, a mixing system, and a packaging system. The toner delivery system includes selectively engageable fluid delivery lines for delivering toner of particular color to a cartridge as need for producing a custom color toner in response to an electronically submitted user request. Cartridge containing the unmixed delivered toner may be sealed by a sealing system, and blended using a resonant mixer to produce a custom color toner. The cartridge containing the mixed custom color toner may be packaged using a packaging system.
    Type: Application
    Filed: March 30, 2012
    Publication date: October 3, 2013
    Applicant: XEROX CORPORATION
    Inventors: Santiago FAUCHER, Gerhard Pawelka, Majid Kasmaei Kamel, Michael S. Hawkins, Suxia Yang, Richard P.N. Veregin, Joseph Barbisan
  • SUPER LOW MELT TONER WITH CORE-SHELL TONER PARTICLES
    Publication number: 20130236829
    Abstract: A toner particle having a core and a shell, and a method for making the toner particle. The core includes a crystalline resin and the shell includes an amorphous resin. The shell is substantially to completely free of the crystalline resin. The toner particle permits inclusion of greater amounts of crystalline resin materials in the core, thereby lowering the minimum fusing temperature of the toner formed from the particles.
    Type: Application
    Filed: March 6, 2012
    Publication date: September 12, 2013
    Applicant: XEROX CORPORATION
    Inventors: Jordan H. Wosnick, Richard P. N. Veregin, Edward G. Zwartz, Michael S. Hawkins
  • MIXER APPARATUS AND METHOD OF MAKING DEVELOPER
    Publication number: 20130164664
    Abstract: The present teachings describe an apparatus for mixing developer. The apparatus includes a first loader for dispensing a predetermined amount of toner particles into a container and a second loader for dispensing a predetermined amount and carrier particles in the container. A sealer seals the container. An acoustic mixer is provided for mixing the container, toner particles and carrier particles at a resonant frequency. A method of mixing developer is disclosed.
    Type: Application
    Filed: December 21, 2011
    Publication date: June 27, 2013
    Applicant: XEROX CORPORATION
    Inventors: Majid Kamel, Suxia Yang, Richard P.N. Veregin, Michael S. Hawkins, Cuong Vong, Santiago Faucher
  • Rosin-based resin and toner containing same
    Patent number: 8431303
    Abstract: Disclosed is a polyester resin comprising the polycondensation product of (a) at least one diacid, acid ester, or diester; and (b) at least one diol; wherein either (i) at least one diacid, acid ester, or diester comprises a rosin diacid, rosin acid ester, or rosin diester; or (ii) at least one diol comprises a rosin diol. Also disclosed is a toner composition comprising particles which comprise the disclosed polyester resin and an optional colorant.
    Type: Grant
    Filed: January 17, 2011
    Date of Patent: April 30, 2013
    Assignee: Xerox Corporation
    Inventors: Guerino G Sacripante, Ke Zhou, Edward G Zwartz, Paul J Gerroir, Michael S Hawkins